Pump for oil-wells.



c. DICKINSON. V PUMP FOB OIL WILLS.

APPLICATION FILED 1130.20, 1907.

Patented Oct. '13, 1908.

CHARLES DICKINSON, OF MARICQPA, CALIFORNIA.

PUMP l on OIL-WELLS.

I Specification 01 Letters Patent.

Patented Oct. 13, 1908.

Application filed December 20, 1907. Serial No. 407,449.

To all whom it may concern:

Be it known that 1, CHARLES I)ICKI \SUN a citizen of the United States, residing at Maricopa, in the county of Kern and State ofCalifornia, have invented a new and useful Pump for Oil-\Vells, of which the following is a specification.

In pumping oil wells, and especially with thick oil or where there is considerable sand, great difiiculty is frequently enc untered in operating the pump owing to'tlic liability of the sand, shale and other sediment getting intotlie pump and the pump casing and thereby clogging the same to such an extent that it is impossible to reciprocate the piston. Ordinarily this condition of affairs necessitates the removal of the entire pumping mechanism and cleaning the same, after which the arts are again inserted in the well. Besides consumin g a great deal of time and incurring considerable expensethe loss of oil during the cessation of the pumping operation amounts to considerable and in some places the character of the oil and the abundance of the sand renders it necessary to repeat the operation of removing and cleaning the pump at short intervals,- frequently every day. and sometimes ofteuer.

The princi a'l object of my invention is to avoid these ifiicult'ies by providing pumping mechanism in which it s almost. impossible to clog the sameto such an extentas'to render it iinpossibleto operate the piston and in case of its being absolutely necessary to remove the operative parts of the pump, I-

so construct the same that they can be easily removed fronrthe well. cleaned or repaired, and quickly re-inserted.

In the accom )an ii drawin swhich illustrate one form 'of the invention; Figure 1 f is a broken,- vertical, sectional. view of an oil well provided with my; improved pun p, showing the plunger in, its elevated'or opera .tiveposition. Fig. 2 is a verticahsectional plunger in its lowered position in which-the end-of the'sinker enga es with the top of-the I workingbarrel and orces it into' itsseat- Figfifil is "a bottom end view of the working I bartel and standing valve seat.

Referring more part-icularlv to-the draw-2 la r M.

view of thepumpingg iiechanismzwith the ingsywhich are-for illustrative purposes-only scale wee -a "0 niryconst-rnct tlier explanation. Within the tubing 1 arranged a pump casing 3 which also may be of any ordinary construction and. be secured at the upper end by the usual clamping means 4. Secured to the lower end of the casing, is a coupling 5, having its bore or inner surface flared upwardly and out wardly, as at 6, within whieli'is secured a yielding packing 7, preferably formed from lead or Babbitt metal. The upper endof the packing is thicker than the lower end and its bore or inner surface is also preferably flared form a downwardly extending i or project tion 11. which has a'sharp'et adapted to form a shoe that can be used in the san'ie-inanncr the ordinary shoe when.

the pumping plunger has been drawn up out of the way. In this manner the. coupling becones'a combined barrel seat and shoe.

Secured to the lower end of the working barrel 8 is a staiidin valve seat 12, which is preferably in the orni of aplug that is screwed into the lower end of the barrel and is provided with a central bore or perforation 13 and with a transverse slot 14 in its lower end for screwing it into and out of the ,working barrel 8. A valve 15 is adapted to rest upon the seat 12 in the ordinary manner and is confined by a cage 16. The plug or seat ll-is preferably provided 'with two shoulders 16' and 16", one of which fit-S against. a shoulder 17 formed by rccessing the lower end of the barrel 8, and the other shoulderis'ada ted' to be engaged by the e that lmfer end of t e cage 16, when the. parts i are assembled. .A pin 18is remova'bly seatedin registering: erforations inlthe plug and working barre for'pleventing-"the plu from becoming accidentally'unsciiewed' an lost.

Reciprocally mounted inthe' working barrel 8 is a hollow-piston19=which "forms the pump plunger and which is pi'ovidediat-its up er end witha valve'seai. 20, upon which is ooselv mounted the valve 21,-which is also Y confined byacage 22. The' valve is recipro-v & cated: by a rod or cable 23,)which may i be connected directlyto the. cage 22 inthe ordi nn ryi :nianner'; "but 5 f preferably? provide.

vsinker At which insures the arts sinking through the heavy oil and santFwhich is liable to bc mieountered. The sinker is preferably connected with the plunger 19, or cage -32, by means of a stem 25 which is of a less diameter than the sinker, and the sinker is of a greater diameter than the upper'end of the plunger 1!) so as to seat the same without danger of knocking out the standing valve seat, the stem being of such a length that the lower end of the plunger 19 cannot engage with the 'standin valve 15' when the sinker engages with tie upper end of the barrel 8.

"lhe pump lunger 19 is referably connected with t e standing va ve seat 12, as by means of what-is known as the Garbutt. attachment, which comprises a rod 26 that. is'connecte d with the cage 16 at its lower end in any ordinary manner, and has its upper end provided with a head or enlargement 27 that is adapted to engage with shoulders, a collar 28, at the lower end. of the plunger 19 and. thereby lift the standing valve 12' upward when the pump plunger is drawn out of the well. The cages are preferably connected with their 0 eratin'g means by screw threaded joints through which pins 29 and 30. are passed for the purpose of preventing their being separated, and especially by the twisting or rotation ofthe cable 23'. Pins 31', arealso preferably provided for locking the cages amidplunger against being. accidentally unscrew j I By constructing the parts of a the above describedmanner, it, wil be evident that the diameter of the plungpr must necessarily be considerably less"t an the diameter of the casing, which will afford considerable of space 'w1thin the casing, up

which the material is gvadua lly lifted by the:

reciprocation of the pump plunger. This excess of area or capacity of the casing over the capacity of the plunger will prevent the accumulation of sand and sediment within the casing 'to such an'ex tent as to pack around the reciprocating parts and thereby hold them against movement. If it should be desirable, at any time, to remove-the.

pumping plunger and its accessories, when it is drawn upward the Garbu-tt attachment forms a connection between it and the workiug barrel through the standing valve seat and. will cause the working barrel to be lifted out of its leaden seat and entirely out of the rll if desired, or only far enough to permit the seduuent m the bottom oflhe casing to run. back into the well, after which the plunger and working barrel can be lowered Lato their operative positions and the work -rocecded with, with ,but little loss of time and labor; \Vhwn thepump is being low-. cred into the well the lower end of the working barrel r mlily enters" the upper end of the flaring eat and after the enlarged lower ump in readily replaced and the as good as new at that point.

end engages with the seat the sinker is then dropped a few times onto said upper end which will seat the barrel so firmly that it will not 'work loose during the process-of pumpin the sharp edge of the coupling 5. can be utili -ed as an ordinary casing shoe for cutting any rock or other obstruction in case it is desired tosmk the well deeper.

The plunger and working barrel may be.

readily disconnected by unscrewing the standing valve at the bottom of the working barrel after which the other parts of the pump may be as readily taken apart or dis- By lifting the. plunger and working baras mbled, thereby permitting access being,

he to any part for the purpose of cleaning or repair. c;

In connecting the parts together, the pump plunger is assembled in the ordinary manner and inserted int6 the working barreluntil'the lower end of the Gar-butt attachlnent projects from the lower end of the barrel' The cage and standing valve are then screwed onto ihe attaclnnent and the valve is t en screwed into the lowerend of the wor in barrel and thepuinp is ready 'to be into the well. The lead packing is comparatively in'expensive ;.-nd can be quickly seated in the taered bore 6 and will engage with the workmgbarrcl with suflicient friction to hold the hitter stationary under ordinary conditions,

but will readily permit of the barrel-being drawn upward. with the upward movement I ofthe pumping plunger. It will also prevent the presence of sand or other sediment.

from interferingwith the proper seating of the working barrel when the latter is low.-

cred into position and in case it should beeo'me worn or rendered defective, it can beg pump thereby made Having described my invention I claim 1. Tu a pump rel adapted to e removably seated at its upper end' by frictional contact at the lower end of the casing, a perforated lug removably secured in the'lower end 0 said barrel having .ashoulder at its lower endfor engaging with the lower end of said barrel and provided .with. a valve seat. at the upper end of said perforation, and reciprocatory pumping mechanism connected with said plug sons to remove the latter by unseating said upper end when the pumping median-- ism'is drawn upward beyond its MII'Illtll limit.

3. In a pump for oil wells. :1 working bar ,uvper i rel'adapted to be removably seated at its upfor oil wells, a working -barper by'frictional contact at the lower end of the casing, a shouldered perforated plug secured in the lower end of said barrel andhavinga valve seat at its upper end, one of said shoulders engaging with the lower end of the working barrel, a cage engaging with the other shoulder, a rod connected with said cagehaving its a per end pro- \uled with a head, and a va ved reciprocatory plunger within the working barrel having its lower end provided with shoulders which are adapted to engage with said head 'and lift the valve seat and unseat said working barrel when the plungeris drawn upward.

3. In-a pump for oil wells, a casing pro-' vided with a tapering seat atits lower end,

a yielding metallic packing within said seat having an upwardly expanded bore. a work ing barrel therein having its upper end enlarged externally and detachably engaging with said packing by frictiol'ial. contact, and a reciprocatory pumping plunger withii'i the working barrci and of considerably less internal diameter than the casing and connected with the working barrel at its lower end, whereby the latter I may be unseated and drawn upward when the pumping plunger is drawn-upward.

4. In a pump for oil wells, a casing provided with a tapering valve seat in its lower Al (1,)! working barrel therein having an enla'rged tapering upper end to fit said seat a'nd be secured therein by frictional contact, a standing valve secured to the lower end of said Lworking barrel, and provided with a headed rod, a hollow plunger reciprocally mounted inv the barrel provided with a valve at its upper end and with arshoulder at its lower end adapted to engage said head, a

stem secured to the upper end of said plunger, and a sinker secured to the upper end of said stein ofgreater diameter at its lower end than the top of the working barrel and adapted to engage with the upper end of the working barrel and drive it into its seat, the

length of said stem being suchthat the lower end of the plunger w1ll be at a distance above the standing valve when the. sinker is in contact with the top of the Working barrel.

5. In a pump for oil wells, a casing, a shoe secured to the lower end of the casing having a sharp cutting edge at its lower end,

a shoulder at its upper end for engaging with the end of the cas ng, and a tapering bore, a yielding metallic packing in said bore havin an u wardl ex andin bore a working barrel having its upper end enlarged externally to engage with sa d packing, a valve secured in the lowereud of said barrel, reciprocatory pumping mechanism within said barrel connected with said valve and adapted to remove the barrel by withdrawing said mechanism, and means eonnected with said mechanism for engaging with the upper end of the barrel and forcing the same into said packing. V

V In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 13th day of December 1907.

CHARLES DICKINSON. In. presence of- W. S. Born,

FRANK L. A. GnAHAM. 

